Adjustable reamer



`July 7, 1925.

O. KYLl N ADJUSTABLE REAMER' Filed Maron l2,1, `1921 MVM/7%) PatentedJuly 7,

OSKAR KYLIN, OF ELK-HART, INDIANA.

To all lwhom t may Be it known that I, OSKAR PAT-ENT oFFlc.

ADJUSTABLE BEAMER.

Application le March 21, 1921. Serial No. 454,251.

concern KYLIN, a citizen of the United States, residing at Elkhart, inthe county of Elkhart and State of 5 Indiana, have invented certain newand useful Improvements in of which the following is a specification.

This invention relates to adjustable reamers, and has reference moreparticularly to adjustable reamers ofthe type designed and adapted toline-ream pistons, but adapted the wrist-pin holes in to be used withequal advantage for reaming any kind of a hole.

My .present invention embodies the same broad principle for effect-ingexpansion` and contraction of the reamer blades as that disclosed in aformer application filed by me on the third day of No. 434,496; but

January, 1921, Serial embodies certain improvements on the structure ofthe aforesaid application by considerably otherwise simphied.

In order that understood, I have which the number reduced, and thestructure is of parts is the lnvention may be clearly illustrated thestructural features thereof inthe accompanying drawin whereinig. 1 is anelevation of the complete tool Fig. 2 is a longitudinal axial section ofthe same;

Figs. 3 and lare cross sections on the line 3-3 and 1P-4, respectivelyof Fig. 2; and

Fig. 5

is a fragmentary axial section,

showing a modification wherein the stem or shank of the reamer body.

is separable from the Referring to the drawings, 6 designates as anentirety the shown in Figs.

body of 1 to 4, is formed with a conthe reamer which, as

tinuous or integral stem or shank 7. The

body ofthe reamer is herein shown as six spaced longitudinal bottom wallof each provided with a series, in number, of equally radial slots 8,and the slot is formed with a.

series, herein'shown as three, of inclined cam surfaces 9 which are Theend portions 6 of reduced diameter,

to receive an slots 8 are located integral with the body. and 6b of. thebody are as best shown in .,Fig.

is threaded tore- 7 is likewise threaded Within the the reamer blades12.

Adjustable Beamers,

` Each of these blades is formed on its inner edge with cam surfaces or`seats 13 which cooperate with the cam surfaces 9 formed on the bottom'walls of the blade slots. Each blade is also formed at its outer endwith an inclined cam seat 14, 4and at its inner end with an oppositelyinclined seat 15.

On the reduced outer end 6a of the body is slidably mounted a collar 16formed on -its inner end with a cam 17 which engages with the cam seats14 of the blades, and between the collar 16 and the adjusting nut 10 isa coil compression spring 18, the action of which is to force the blades12. endwise through the collar 16 and cause said blades to be expandedradially of the body by ridin up on the cam surfaces 9 of the slotbottoms. Slidably mounted on the reduced end b `of the body is anothercollar 19 which is splined thereon by means of a radial pin 20 engagedwith one of the blade slots 8. This collar 19 lies between the adjustingnut 11 and the adjacent end of the blades, and on its inner end isformed with a cam seat 21 which cooperates with the cam seats 15 of theblades. When the nut 11 is turned up, the collar 19 cooperates with thespring pressed collar 16 to retract the blades inwardly of their slots.The collar 11 is provided with a micrometer scale 22 which cooperateswith` an index line 23 on the collar 19 to measure the amount of bladeadjustment.

The manner of adjusting the blades is readily apparent from theforegoing description of the structure. The spring 18 is at all timesunder compression, so that the cooperating cam seats 11 and 17 at oneend and 15 and 21 at the other hold the blades rigidly in lixedposition. To adjust the blades outwardly, the nut 11 is turnedbackwardly, allowing the spring 18, acting through the collar 16 toforce the blades endwise and cause them to ride up on the' cams 9. 'Ioretract the blades inwardly, the

`nut 11 is turned forwardly and, through the collar 19, forces ,thebladesl endwise in the opposite direction causing them to blades and onthe ends of the collars, this the thrust action at the same timeincreasing v,thrust of of the spring 18. The working 'tapered shank 24which the latter may be nicely regulated at any time by manipulation ofthe adjusting nut l0. i i

In F ig. 5 I have shown a slightly modified construction which employs astem or shank 7 that is separable from the body of the reamer. In thisconstruction the outer end of the body beyond the thr-eaded portionwhich receives the nut l1 is" formed as a lits a correspondingly taperedsocket 25 in thetool shank or stem 7a, and the outer portion of thesocket 25 is enlarged and tapped as shown at 25a for threaded engagementwith the threaded portion of the body.

The tool herein describedh-as been designedas a general purposeadjustable hand reamer of simple and inexpensive construe-i tion andrequiring only one adjusting nut for both expanding and contracting thereamer blades. The amount of adjustment can' be read off directly bymeans of the micrometer graduations 22 on the adjusting nut 1l, and thelarge diameter of the reamer body aii'ords rigid support for the bladesin the slots. The tool provides ample chip clearance, the properlydimensioned helical spring 18 affords ease and accuracy of adjustmentand by reason of its flexibility the reamer will produce a very superiorfinish in the hole. To provide av tool possessing the desirable'characteristics above mentioned has been the chief object and aim ofthe present invention.

I claim:

l'. In an adjustable reamer, the combination of a body having aplurality of longitudinal blade slots, the bottom of each of said bladeslots being formed into a plurality of longitudinally inclined camsurfaces integral with said body, blades arranged in saithslots andadapted for outward and inward movement, cam means for moving saidblades inwardly, means for moving said cam means longitudinally of saidbody, and spring presscdcam means cooperating with said inclined camsurfaces to move said 'blades outwardly.

In an adjustable reamer, the combination of a body having a plurality ofblade slots, the bottom of each being formed -into a plurality oflongitudinally inclined cam surfaces integral with said body, bladesarranged in said slots and adapted for outward and inward movement, acam collar slidably mounted on said body and engaged with saidblades tomove the latter finwai-diy. a nut mounted on said body and adapted toforce said cam collar against one end of said blades, a spring pressedcam collar slidably mounted on said body and engaged with the other endof said blades and serving, in cooperation with said inclined camsurfaces to more said blades outwardly.

tudinal blade `In an adjustable reamer, the combina-- tion of a bodyhaving a plurality of blade slots, the bottom of each of said bladeslots eing formed into a plurality of longitudinally inclined camsurfaces integral with said body, blades arranged in said blade slotsand formed with cam surfaces on their inner edges engaged with saidinclined cam surfaces in said blade slots, cam means for moving saidblades inwardly, --means for moving said cam means longitudinally ofsaid body, and spring'pressed Cain means cooperating with the camsurfaces/ on the bottoms of said slots to move said blades outwardly.

t. yIn an adjustable reamer, tion of a body having a plurality oflongitudinally blade slots, each having its bottom formed into aplurality, of longitudinally inclined cam surfaces integral with saidbody, a plurality of outwardly and inwardly movable blades formed withcam seats at both ends, a longitudinally movable collar splined on saidbody and formed with a cam seat on its inner end and adapted to actuatesaid blades inwardly, means for forcing said collar against said blades,and a spring pressed collar sleeved on said body and formed on its innerend with a cam engaged with the cam sheets on one end of said blades,whereby, through the pressure of said spring-pressed collar actingthrough said cam, cam seats and cam surfaces, said blades are actuatedlongitudinally and outwardly.

5. In an adjustable reamer,. the combination of a body having aplurality of longitudinal blade slots each having its bottom formed intoa plurality of longitudinally inclined cam surfaces integral with saidbody, aplurality of outwardly and inwardly movable blades formed withcam seats on `their ends and cam surfaces on their inner edges, alongitudinally movable collar splined on said body and engaging camseats on one end of said blades, means for forcing' said collar againstsaid blades, a second collar sleeved on said body and engaging the camseats at the other end of said blades, and a spring backing said secondcollar and adapted to be compressed by the longitudinal movement of thefirst collar, said spring and said second collar bcing adapted to forcesaid blades outwardly vwhen the reamer is inserted in a hole and whensaid first collar is moved away from said blades so as to allow anoutward movement of the latter.

(i. In an adjustable reamer, the combination of a body having aplurality of longislots each having its bottom formed into a pluralityof longi'tlulinally inclined cam surfaces integral with said body, aplurality of outwardly and inwardly movable blades formed with cam seatsop the combinatheii` ends and cani surfaces on their` inner edges, a VAh)ngitudinally movable collar splined on said body and engaging the cziniseats on one end of said blades, a nut on said body behind said` collarfor. forcing the latter against saidblades, w second collar sleeved onsaid body and engaging the cam seats at the other end of said blades.,al coil spring spring land constituting an adjustable abutment for thelatter.

osKAR KYLIN.

